How can I make exceptions to the whitespace rule?

[Thesecondbestname]

I want my parser to ignore every whitespace and newline except between two expressions or after a use statement. I'm sure I can work the two subsequent expressions out but how do I make exceptions to the whitespace rule? I've thought about using the stack here to as in adding a PUSH("USE") ~ POP at the end of the use statement and check the stack inside the whitespace rule but I don't know how to check the stack for a specific value. I am very new so please be gentle 🤕

[tomtau]

I guess defining rules as atomic and non-atomic can help: http://pest.rs/book/grammars/syntax.html#implicit-whitespace ?

[Thesecondbestname]

Is this the only way? Because I think I'd have to implement the whitespace rule manually where I just want to require one...

[Thesecondbestname]

I think it could be done via the stack but I don't know how to match on PEEK. Is that possible? Something like PEEK == "USE" ?

[tomtau]

The stack manipulation is for matching the same text: https://pest.rs/book/grammars/syntax.html#the-stack-wip

so PUSH("USE") and then POP or PEEK means to match: USE ... USE

[Thesecondbestname]

Thanks a lot! Thanks to a critical error in my thought process it took me a day to understand how to do it using atomic rules.